Verzeichnisstruktur phpBB-3.1.0
- Veröffentlicht
- 27.10.2014
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config.php
001 <?php
002 /**
003 *
004 * This file is part of the phpBB Forum Software package.
005 *
006 * @copyright (c) phpBB Limited <https://www.phpbb.com>
007 * @license GNU General Public License, version 2 (GPL-2.0)
008 *
009 * For full copyright and license information, please see
010 * the docs/CREDITS.txt file.
011 *
012 */
013
014 namespace phpbb\config;
015
016 /**
017 * Configuration container class
018 */
019 class config implements \ArrayAccess, \IteratorAggregate, \Countable
020 {
021 /**
022 * The configuration data
023 * @var array(string => string)
024 */
025 protected $config;
026
027 /**
028 * Creates a configuration container with a default set of values
029 *
030 * @param array(string => string) $config The configuration data.
031 */
032 public function __construct(array $config)
033 {
034 $this->config = $config;
035 }
036
037 /**
038 * Retrieves an ArrayIterator over the configuration values.
039 *
040 * @return \ArrayIterator An iterator over all config data
041 */
042 public function getIterator()
043 {
044 return new \ArrayIterator($this->config);
045 }
046
047 /**
048 * Checks if the specified config value exists.
049 *
050 * @param string $key The configuration option's name.
051 * @return bool Whether the configuration option exists.
052 */
053 public function offsetExists($key)
054 {
055 return isset($this->config[$key]);
056 }
057
058 /**
059 * Retrieves a configuration value.
060 *
061 * @param string $key The configuration option's name.
062 * @return string The configuration value
063 */
064 public function offsetGet($key)
065 {
066 return (isset($this->config[$key])) ? $this->config[$key] : '';
067 }
068
069 /**
070 * Temporarily overwrites the value of a configuration variable.
071 *
072 * The configuration change will not persist. It will be lost
073 * after the request.
074 *
075 * @param string $key The configuration option's name.
076 * @param string $value The temporary value.
077 */
078 public function offsetSet($key, $value)
079 {
080 $this->config[$key] = $value;
081 }
082
083 /**
084 * Called when deleting a configuration value directly, triggers an error.
085 *
086 * @param string $key The configuration option's name.
087 */
088 public function offsetUnset($key)
089 {
090 trigger_error('Config values have to be deleted explicitly with the \phpbb\config\config::delete($key) method.', E_USER_ERROR);
091 }
092
093 /**
094 * Retrieves the number of configuration options currently set.
095 *
096 * @return int Number of config options
097 */
098 public function count()
099 {
100 return count($this->config);
101 }
102
103 /**
104 * Removes a configuration option
105 *
106 * @param String $key The configuration option's name
107 * @param bool $use_cache Whether this variable should be cached or if it
108 * changes too frequently to be efficiently cached
109 * @return null
110 */
111 public function delete($key, $use_cache = true)
112 {
113 unset($this->config[$key]);
114 }
115
116 /**
117 * Sets a configuration option's value
118 *
119 * @param string $key The configuration option's name
120 * @param string $value New configuration value
121 * @param bool $use_cache Whether this variable should be cached or if it
122 * changes too frequently to be efficiently cached.
123 */
124 public function set($key, $value, $use_cache = true)
125 {
126 $this->config[$key] = $value;
127 }
128
129 /**
130 * Sets a configuration option's value only if the old_value matches the
131 * current configuration value or the configuration value does not exist yet.
132 *
133 * @param string $key The configuration option's name
134 * @param string $old_value Current configuration value
135 * @param string $new_value New configuration value
136 * @param bool $use_cache Whether this variable should be cached or if it
137 * changes too frequently to be efficiently cached.
138 * @return bool True if the value was changed, false otherwise.
139 */
140 public function set_atomic($key, $old_value, $new_value, $use_cache = true)
141 {
142 if (!isset($this->config[$key]) || $this->config[$key] == $old_value)
143 {
144 $this->config[$key] = $new_value;
145 return true;
146 }
147 return false;
148 }
149
150 /**
151 * Increments an integer configuration value.
152 *
153 * @param string $key The configuration option's name
154 * @param int $increment Amount to increment by
155 * @param bool $use_cache Whether this variable should be cached or if it
156 * changes too frequently to be efficiently cached.
157 */
158 function increment($key, $increment, $use_cache = true)
159 {
160 if (!isset($this->config[$key]))
161 {
162 $this->config[$key] = 0;
163 }
164
165 $this->config[$key] += $increment;
166 }
167 }
168